The TSA also will allow passengers to carry on billiard cues, ski poles, hockey sticks, lacrosse sticks and two golf clubs and toy plastic bats, such as wiffle ball bats.

The TSA says the change will allow it to focus on more serious threats. But groups that represent pilots and flight attendants have said the change would put them in danger.

Flight Attendants in Los Angeles and Dallas also are leading protests against the change. On Monday, flight attendants in Los Angeles carried large yellow signs from terminal to terminal that read “No Knives, Ever Again.”

The Flight Attendants Association hopes that passengers will pressure the TSA and Congress into changing the ruling; Congress has scheduled hearings for next month to review the TSA policy change.